防不胜防 fáng bù shèng fáng

DEFINITIONS

  1. you can't guard against it (idiom)
  2. impossible to defend effectively
  3. not much one can do about it
  4. It can't be prevented.

CHARACTERS

防 fáng defend; prevent; embankment
不 bù no, not; un-; negative prefix
胜 shèng victory; excel, be better than
防 fáng defend; prevent; embankment